I think that people do indeed have a harder time perceiving the physical structure of the code, especially if they’re not spatially oriented as thinkers, e.g. m

I think that people do indeed have a harder time perceiving the physical structure of the code, especially if they’re not spatially oriented as thinkers, e.g. myself, I’m a Linguistics person first and foremost, not very good at spatial reasoning. You should really consider using linters as a teaching aid. They help a lot, and would indeed catch the problem you noted about js.